Wearable Shoulder Exoskeleton for Enhancing Post-Stroke Reachable Workspace
Faculty Mentor Information
Dr. Joel Perry, University of Idaho
Presentation Date
7-15-2026
Abstract
With an estimated 250,000 individuals in the U.S. experiencing stroke-induced upper extremity impairments each year, there is a pressing need for accessible therapeutic interventions. The aim of this project is to further improve and validate the effectiveness of a lightweight shoulder exoskeleton in increasing reachable workspace after chronic post-stroke impairment. The exoskeleton utilizes a cam system and natural rubber springs to convert linear spring force into a gravity balancing torque for the arm. A structural redesign aimed to increase the available range of motion to 90 degrees. The support load versus shoulder elevation angle was measured using a single-axis load cell and a potentiometer to validate the cam geometry and system hysteresis. Results demonstrate the maximum amount of support being applied when the arm is at its peak range of motion and the least amount of support when the arm is at rest by the user’s side. Clinical trials utilizing wearable motion trackers will evaluate users' daily motion with the purpose of promoting sustained arm use beyond the rehabilitation environment.
Wearable Shoulder Exoskeleton for Enhancing Post-Stroke Reachable Workspace
With an estimated 250,000 individuals in the U.S. experiencing stroke-induced upper extremity impairments each year, there is a pressing need for accessible therapeutic interventions. The aim of this project is to further improve and validate the effectiveness of a lightweight shoulder exoskeleton in increasing reachable workspace after chronic post-stroke impairment. The exoskeleton utilizes a cam system and natural rubber springs to convert linear spring force into a gravity balancing torque for the arm. A structural redesign aimed to increase the available range of motion to 90 degrees. The support load versus shoulder elevation angle was measured using a single-axis load cell and a potentiometer to validate the cam geometry and system hysteresis. Results demonstrate the maximum amount of support being applied when the arm is at its peak range of motion and the least amount of support when the arm is at rest by the user’s side. Clinical trials utilizing wearable motion trackers will evaluate users' daily motion with the purpose of promoting sustained arm use beyond the rehabilitation environment.